Assembly: System.Net (in System.Net.dll)
This event is raised each time an asynchronous upload makes progress. This event is raised when uploads are started using any of the following methods.
Sends a String to the resource, without blocking the calling thread.
Classes that inherit from this class can override this method to perform additional tasks when the UploadProgressChanged event occurs.
Raising an event invokes the event handler through a delegate.
The method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.Notes to Inheritors
When overriding in a derived class, be sure to call the base class’s method so that registered delegates receive the event.